Semi sandwich panel

ABSTRACT

The present invention relates to a semi sandwich panel in which a cores material is partially formed in a portion which needs a strength and intensity between both surface finishing materials formed of a textile for thereby implementing a certain strength and intensity of a sandwich panel, so that it is possible to obtain a certain strength and intensity as a structure member which is a feature of a sandwich panel, and the number of fabrication processes is decreased, and the fabrication cost is decreased. A core material is inserted into a portion which needs a certain strength and intensity between both surface finishing materials formed of a textile.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a sandwich panel used as aninterior finishing material for a train and ship, and in particular to asemi sandwich panel which has a certain lightness and strength and isfabricated at a lower cost.

[0003] 2. Description of the Background Art

[0004] Generally, an interior finishing material which is used for atrain and ship formed of a metallic material, is fabricated at a lowercost. A complicated product may be fabricated using the above material.In this case, it is easier to maintain the train and ship. However, thetrain and ship having an interior formed of a metallic interiorfinishing material is easily rotten. So, the life span is short. Thetotal weight of the train or ship is increased due to the metallicinterior finishing material. Therefore, in order to overcome the aboveproblems, a surface finishing material and core material formed of atextile are overlapped and bonded using an adhesive for therebyfabricating a sandwich panel which is used as an interior finishingmaterial in the train and ship.

[0005] The above sandwich panel is lighter than a metallic panel and hasa better strength with respect to its weight and a better durability.

[0006] However, since a core material filled between the surfacefinishing materials is fully used or included in all over the surfacefinishing material, the number of the fabrication processes isincreased, and the fabrication cost is significantly increased.

SUMMARY OF THE INVENTION

[0007] Accordingly, it is an object of the present invention to providea semi sandwich panel which overcomes the problems encountered in theconventional art.

[0008] It is another object of the present invention to provide a semisandwich panel which is capable of partially forming a core materialfilled between both surface finishing materials formed of a textile in aportion which needs an increased strength and intensity of a sandwichpanel for thereby implementing a certain structural strength andintensity of a sandwich panel, simplifying the number of fabricationprocesses and decreasing the fabrication cost.

[0009] In order to achieve the above objects, there is provided a semisandwich panel in which a core material is inserted into a portion whichneeds a strength and intensity between both surface finishing materialsformed of a textile.

[0010] The surface finishing material is formed of more than onematerial selected from the group formed of a glass fiber, a carbonfiber, a synthetic fiber, and an aramid fiber.

[0011] The core material is formed of more than one material selectedfrom the group formed of an aluminum honeycomb, a nomex honeycomb, apaper honeycomb, a urethane foam, and an acrylic foam.

[0012] The insert nut is installed in the core material formed betweenboth surface finishing materials for implementing a mounting structure.

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will become better understood withreference to the accompanying drawings which are given only by way ofillustration and thus are not limitative of the present invention,wherein;

[0014]FIG. 1 is a perspective view illustrating a semi sandwich panelaccording to a first embodiment of the present invention;

[0015]FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

[0016]FIG. 3 is a cross-sectional view illustrating a mounting structureof a semi sandwich panel of FIG. 1;

[0017]FIG. 4 is a perspective view illustrating a semi sandwich panelaccording to a second embodiment of the present invention;

[0018]FIG. 5 is a cross-sectional view taken along line B-B line of FIG.4; and

[0019]FIG. 6 is a cross-sectional view of FIG. 4.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] The preferred embodiments of the present invention will beexplained with reference to the accompanying drawings.

[0021]FIGS. 1 through 3 are views illustrating a semi sandwich panelwhich is used as an interior finishing material for a train according toa first embodiment of the present invention.

[0022] As shown therein, a core material 14 is formed into a portionwhich needs a certain strength and intensity between both surfacefinishing materials 12 formed of a textile for thereby forming a semisandwich panel 10.

[0023] As an example of the textile surface finishing material 12, aglass fiber is impregnanted into a phenol or epoxy resin for therebyproducing a prepreg. The prepreg is disposed on a mold or a moldingbase. Thereafter, a core material 14 is partially inserted into an edgeportion of the inner surface of the surface finishing material 12 and ina rib shape across the edge portions based on a known method forimplementing a certain strength and intensity and is molded at a hightemperature or is fabricated based on a hand lay up method at a roomtemperature and is hardened for thereby fabricating a semi sandwichpanel 10.

[0024] As shown in FIG. 3, in the semi sandwich panel 10, a certainnumber of insert nuts 16 are installed in the interior of the corematerial 14 for mounting in the structure of a train. A connectionbracket 20 is fixed to the insert nut 16. In addition, the connectionbracket 20 is installed in the semi sandwich panel 10, so the semisandwich panel 10 is mounted on the structure of the train.

[0025]FIGS. 4 through 6 are views illustrating a semi sandwich panel foran interior finishing material of a train according to a secondembodiment of the present invention and illustrating a semi sandwichpanel in which a window frame is integrally formed.

[0026] As an example of the textile surface finishing material 12, aglass fiber is impregnanted into a phenol or epoxy resin for therebyproducing a prepreg. The prepreg is disposed on a mold or a moldingbase. Thereafter, a core material 14 is partially inserted into an edgeportion of the inner surface of the surface finishing material 12 and acircumference of the window frame 10 a in a rib shape based on a knownmethod for implementing a certain strength and intensity and is moldedat a high temperature or is fabricated based on a hand lay up method ata room temperature and is hardened for thereby fabricating a semisandwich panel 10.

[0027] The insert nut is installed in the core material 14 in the samemanner as the first embodiment of the present invention.

[0028] In the first and second embodiments of the present invention, thetextile surface finishing material 1 is formed of more than one materialselected from the group formed of a glass fiber, a carbon fiber, asynthetic fiber, an aramid fiber.

[0029] In addition, in the first and second embodiments of the presentinvention, the core material 14 is formed of more than one materialselected from the group formed of an aluminum honeycomb, a nomexhoneycomb, a paper honeycomb, a urethane foam, and an acrylic foam.

[0030] In the first and second embodiments of the present invention, thecore material 14 which is partially filled between both surfacefinishing materials 12, namely, is filled into a portion which receivesa stress and needs a certain strength and intensity. The core material14 is partially inserted between both surface finishing materials 12 invarious shapes based on the shape and purpose of the interior finishingmaterial.

[0031] As described above, in the semi sandwich panel according to thepresent invention, the core material which forms a structure of thesandwich is partially formed in an edge portion of the panel which needsa strength and intensity between both surface finishing materials and ina rib shape across the edge portions or in the case of the window frame,the core material is formed in an edge portion of the panel and thecircumference of the window frame in a rib shape for thereby decreasingthe use of the core material compared to the conventional sandwichpanel, implementing a desired strength, intensity and durability anddecreasing the fabrication cost. In addition, in the present invention,it is possible to fabricate the product based on a smaller number of thefabrication processes compared to the conventional fabrication method.

[0032] As the present invention may be embodied in several forms withoutdeparting from the spirit or essential characteristics thereof, itshould also be understood that the above-described embodiments are notlimited by any of the details of the foregoing description, unlessotherwise specified, but rather should be construed broadly within itsspirit and scope as defined in the appended claims, and therefore allchanges and modifications that fall within the meets and bounds of theclaims, or equivalences of such meets and bounds are therefore intendedto be embraced by the appended claims.

What is claimed is:
 1. A semi sandwich panel in which a core material isinserted into a portion which needs a strength and intensity betweenboth surface finishing materials formed of a textile.
 2. The panel ofclaim 1, wherein said surface finishing material is formed of more thanone material selected from the group formed of a glass fiber, a carbonfiber, a synthetic fiber, and an aramid fiber.
 3. The panel of claim 1,wherein said core material is formed of more than one material selectedfrom the group formed of an aluminum honeycomb, a nomex honeycomb, apaper honeycomb, a urethane foam, and an acrylic foam.
 4. The panel ofclaim 1, wherein an insert nut is installed in the core material formedbetween both surface finishing materials for implementing a mountingstructure.
 5. The panel of claim 1, wherein said core material is formedin an edge portion of the inner surface of the surface finishingmaterial and is partially formed across the edge portion of the same. 6.The panel of claim 1, wherein said core material is formed in an edgeportion of the inner surface of the surface finishing material and ispartially formed in a circumference of a window frame.
 7. The panel ofclaim 1, wherein said semi sandwich panel is adapted to an interiorfinishing material of a train or a ship.